화학공학소재연구정보센터
Journal of Molecular Catalysis A-Chemical, Vol.411, 364-371, 2016
Novel Ag/AgCl/K6Nb10.8O30 photocatalyst and its enhanced visible light photocatalytic activities for the degradation of microcystin-LR and acid red G
Novel visible-light response Ag/AgCl/K6Nb10.8O30 composites were synthesized using a wet chemical route and a precipitation-photoreduction method. The as-prepared catalysts were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectro-scope (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), surface photovoltage spectroscopy (SPS) and Nexus Fourier transform infrared (FT-IR) spectroscopy. The TEM result determined the formation of Ag/AgCl/K6Nb10.8O30. The visible-light photocatalytic activity the as-prepared Ag/AgCl/K6Nb10.8O30 composites was evaluated by the degradation of microcystin-LR and ARG aqueous solution. The as-prepared Ag/AgCl/K6Nb10.8O30 composites exhibited excellent photocatalytic activities for the degradation of microcystin-LR and ARG aqueous solution under visible light irradiation, which results from the excellent photo-response of Ag NPs in the visible light region and the efficiently separation of photo-induced carriers caused by the heterostructures. The O-2(center dot-) and h(+) were confirmed to be the main active species in the photocatalytic process and the as-prepared composites remained good stability under visible light irradiation. (C) 2015 Elsevier B.V. All rights reserved.